3656538f26cfe23899e3a361289ddf6031e5ef10
1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
4 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * Rob Clark <robclark@freedesktop.org>
29 #include "pipe/p_state.h"
30 #include "util/u_string.h"
31 #include "util/u_memory.h"
32 #include "util/u_inlines.h"
33 #include "util/u_format.h"
35 #include "freedreno_gmem.h"
36 #include "freedreno_context.h"
37 #include "freedreno_resource.h"
38 #include "freedreno_query_hw.h"
39 #include "freedreno_util.h"
42 * GMEM is the small (ie. 256KiB for a200, 512KiB for a220, etc) tile buffer
43 * inside the GPU. All rendering happens to GMEM. Larger render targets
44 * are split into tiles that are small enough for the color (and depth and/or
45 * stencil, if enabled) buffers to fit within GMEM. Before rendering a tile,
46 * if there was not a clear invalidating the previous tile contents, we need
47 * to restore the previous tiles contents (system mem -> GMEM), and after all
48 * the draw calls, before moving to the next tile, we need to save the tile
49 * contents (GMEM -> system mem).
51 * The code in this file handles dealing with GMEM and tiling.
53 * The structure of the ringbuffer ends up being:
55 * +--<---<-- IB ---<---+---<---+---<---<---<--+
58 * ------------------------------------------------------
59 * | clear/draw cmds | Tile0 | Tile1 | .... | TileN |
60 * ------------------------------------------------------
63 * address submitted in issueibcmds
65 * Where the per-tile section handles scissor setup, mem2gmem restore (if
66 * needed), IB to draw cmds earlier in the ringbuffer, and then gmem2mem
70 static uint32_t bin_width(struct fd_screen
*screen
)
72 if (is_a4xx(screen
) || is_a5xx(screen
))
80 total_size(uint8_t cbuf_cpp
[], uint8_t zsbuf_cpp
[2],
81 uint32_t bin_w
, uint32_t bin_h
, struct fd_gmem_stateobj
*gmem
)
83 uint32_t total
= 0, i
;
85 for (i
= 0; i
< MAX_RENDER_TARGETS
; i
++) {
87 gmem
->cbuf_base
[i
] = align(total
, 0x4000);
88 total
= gmem
->cbuf_base
[i
] + cbuf_cpp
[i
] * bin_w
* bin_h
;
93 gmem
->zsbuf_base
[0] = align(total
, 0x4000);
94 total
= gmem
->zsbuf_base
[0] + zsbuf_cpp
[0] * bin_w
* bin_h
;
98 gmem
->zsbuf_base
[1] = align(total
, 0x4000);
99 total
= gmem
->zsbuf_base
[1] + zsbuf_cpp
[1] * bin_w
* bin_h
;
106 calculate_tiles(struct fd_batch
*batch
)
108 struct fd_context
*ctx
= batch
->ctx
;
109 struct fd_gmem_stateobj
*gmem
= &ctx
->gmem
;
110 struct pipe_scissor_state
*scissor
= &batch
->max_scissor
;
111 struct pipe_framebuffer_state
*pfb
= &batch
->framebuffer
;
112 const uint32_t gmem_alignment
= ctx
->screen
->gmem_alignment
;
113 const uint32_t gmem_size
= ctx
->screen
->gmemsize_bytes
;
114 uint32_t minx
, miny
, width
, height
;
115 uint32_t nbins_x
= 1, nbins_y
= 1;
116 uint32_t bin_w
, bin_h
;
117 uint32_t max_width
= bin_width(ctx
->screen
);
118 uint8_t cbuf_cpp
[MAX_RENDER_TARGETS
] = {0}, zsbuf_cpp
[2] = {0};
119 uint32_t i
, j
, t
, xoff
, yoff
;
120 uint32_t tpp_x
, tpp_y
;
121 bool has_zs
= !!(batch
->resolve
& (FD_BUFFER_DEPTH
| FD_BUFFER_STENCIL
));
122 int tile_n
[ARRAY_SIZE(ctx
->pipe
)];
125 struct fd_resource
*rsc
= fd_resource(pfb
->zsbuf
->texture
);
126 zsbuf_cpp
[0] = rsc
->cpp
;
128 zsbuf_cpp
[1] = rsc
->stencil
->cpp
;
130 for (i
= 0; i
< pfb
->nr_cbufs
; i
++) {
132 cbuf_cpp
[i
] = util_format_get_blocksize(pfb
->cbufs
[i
]->format
);
137 if (!memcmp(gmem
->zsbuf_cpp
, zsbuf_cpp
, sizeof(zsbuf_cpp
)) &&
138 !memcmp(gmem
->cbuf_cpp
, cbuf_cpp
, sizeof(cbuf_cpp
)) &&
139 !memcmp(&gmem
->scissor
, scissor
, sizeof(gmem
->scissor
))) {
140 /* everything is up-to-date */
144 if (fd_mesa_debug
& FD_DBG_NOSCIS
) {
148 height
= pfb
->height
;
150 /* round down to multiple of alignment: */
151 minx
= scissor
->minx
& ~(gmem_alignment
- 1);
152 miny
= scissor
->miny
& ~(gmem_alignment
- 1);
153 width
= scissor
->maxx
- minx
;
154 height
= scissor
->maxy
- miny
;
157 bin_w
= align(width
, gmem_alignment
);
158 bin_h
= align(height
, gmem_alignment
);
160 /* first, find a bin width that satisfies the maximum width
163 while (bin_w
> max_width
) {
165 bin_w
= align(width
/ nbins_x
, gmem_alignment
);
168 if (fd_mesa_debug
& FD_DBG_MSGS
) {
169 debug_printf("binning input: cbuf cpp:");
170 for (i
= 0; i
< pfb
->nr_cbufs
; i
++)
171 debug_printf(" %d", cbuf_cpp
[i
]);
172 debug_printf(", zsbuf cpp: %d; %dx%d\n",
173 zsbuf_cpp
[0], width
, height
);
176 /* then find a bin width/height that satisfies the memory
179 while (total_size(cbuf_cpp
, zsbuf_cpp
, bin_w
, bin_h
, gmem
) > gmem_size
) {
182 bin_w
= align(width
/ nbins_x
, gmem_alignment
);
185 bin_h
= align(height
/ nbins_y
, gmem_alignment
);
189 DBG("using %d bins of size %dx%d", nbins_x
*nbins_y
, bin_w
, bin_h
);
191 gmem
->scissor
= *scissor
;
192 memcpy(gmem
->cbuf_cpp
, cbuf_cpp
, sizeof(cbuf_cpp
));
193 memcpy(gmem
->zsbuf_cpp
, zsbuf_cpp
, sizeof(zsbuf_cpp
));
196 gmem
->nbins_x
= nbins_x
;
197 gmem
->nbins_y
= nbins_y
;
201 gmem
->height
= height
;
204 * Assign tiles and pipes:
206 * At some point it might be worth playing with different
207 * strategies and seeing if that makes much impact on
211 #define div_round_up(v, a) (((v) + (a) - 1) / (a))
212 /* figure out number of tiles per pipe: */
214 while (div_round_up(nbins_y
, tpp_y
) > 8)
216 while ((div_round_up(nbins_y
, tpp_y
) *
217 div_round_up(nbins_x
, tpp_x
)) > 8)
220 /* configure pipes: */
222 for (i
= 0; i
< ARRAY_SIZE(ctx
->pipe
); i
++) {
223 struct fd_vsc_pipe
*pipe
= &ctx
->pipe
[i
];
225 if (xoff
>= nbins_x
) {
230 if (yoff
>= nbins_y
) {
236 pipe
->w
= MIN2(tpp_x
, nbins_x
- xoff
);
237 pipe
->h
= MIN2(tpp_y
, nbins_y
- yoff
);
242 for (; i
< ARRAY_SIZE(ctx
->pipe
); i
++) {
243 struct fd_vsc_pipe
*pipe
= &ctx
->pipe
[i
];
244 pipe
->x
= pipe
->y
= pipe
->w
= pipe
->h
= 0;
248 printf("%dx%d ... tpp=%dx%d\n", nbins_x
, nbins_y
, tpp_x
, tpp_y
);
249 for (i
= 0; i
< 8; i
++) {
250 struct fd_vsc_pipe
*pipe
= &ctx
->pipe
[i
];
251 printf("pipe[%d]: %ux%u @ %u,%u\n", i
,
252 pipe
->w
, pipe
->h
, pipe
->x
, pipe
->y
);
256 /* configure tiles: */
259 memset(tile_n
, 0, sizeof(tile_n
));
260 for (i
= 0; i
< nbins_y
; i
++) {
265 /* clip bin height: */
266 bh
= MIN2(bin_h
, miny
+ height
- yoff
);
268 for (j
= 0; j
< nbins_x
; j
++) {
269 struct fd_tile
*tile
= &ctx
->tile
[t
];
272 assert(t
< ARRAY_SIZE(ctx
->tile
));
275 p
= ((i
/ tpp_y
) * div_round_up(nbins_x
, tpp_x
)) + (j
/ tpp_x
);
277 /* clip bin width: */
278 bw
= MIN2(bin_w
, minx
+ width
- xoff
);
280 tile
->n
= tile_n
[p
]++;
297 for (i
= 0; i
< nbins_y
; i
++) {
298 for (j
= 0; j
< nbins_x
; j
++) {
299 struct fd_tile
*tile
= &ctx
->tile
[t
++];
300 printf("|p:%u n:%u|", tile
->p
, tile
->n
);
308 render_tiles(struct fd_batch
*batch
)
310 struct fd_context
*ctx
= batch
->ctx
;
311 struct fd_gmem_stateobj
*gmem
= &ctx
->gmem
;
314 ctx
->emit_tile_init(batch
);
317 ctx
->stats
.batch_restore
++;
319 for (i
= 0; i
< (gmem
->nbins_x
* gmem
->nbins_y
); i
++) {
320 struct fd_tile
*tile
= &ctx
->tile
[i
];
322 DBG("bin_h=%d, yoff=%d, bin_w=%d, xoff=%d",
323 tile
->bin_h
, tile
->yoff
, tile
->bin_w
, tile
->xoff
);
325 ctx
->emit_tile_prep(batch
, tile
);
327 if (batch
->restore
) {
328 ctx
->emit_tile_mem2gmem(batch
, tile
);
331 ctx
->emit_tile_renderprep(batch
, tile
);
333 fd_hw_query_prepare_tile(batch
, i
, batch
->gmem
);
335 /* emit IB to drawcmds: */
336 ctx
->emit_ib(batch
->gmem
, batch
->draw
);
339 /* emit gmem2mem to transfer tile back to system memory: */
340 ctx
->emit_tile_gmem2mem(batch
, tile
);
343 if (ctx
->emit_tile_fini
)
344 ctx
->emit_tile_fini(batch
);
348 render_sysmem(struct fd_batch
*batch
)
350 struct fd_context
*ctx
= batch
->ctx
;
352 ctx
->emit_sysmem_prep(batch
);
354 fd_hw_query_prepare_tile(batch
, 0, batch
->gmem
);
356 /* emit IB to drawcmds: */
357 ctx
->emit_ib(batch
->gmem
, batch
->draw
);
362 fd_gmem_render_tiles(struct fd_batch
*batch
)
364 struct fd_context
*ctx
= batch
->ctx
;
365 struct pipe_framebuffer_state
*pfb
= &batch
->framebuffer
;
368 if (ctx
->emit_sysmem_prep
) {
369 if (batch
->cleared
|| batch
->gmem_reason
|| (batch
->num_draws
> 5)) {
370 DBG("GMEM: cleared=%x, gmem_reason=%x, num_draws=%u",
371 batch
->cleared
, batch
->gmem_reason
, batch
->num_draws
);
372 } else if (!(fd_mesa_debug
& FD_DBG_NOBYPASS
)) {
379 ctx
->stats
.batch_total
++;
382 DBG("%p: rendering sysmem %ux%u (%s/%s)",
383 batch
, pfb
->width
, pfb
->height
,
384 util_format_short_name(pipe_surface_format(pfb
->cbufs
[0])),
385 util_format_short_name(pipe_surface_format(pfb
->zsbuf
)));
386 fd_hw_query_prepare(batch
, 1);
387 render_sysmem(batch
);
388 ctx
->stats
.batch_sysmem
++;
390 struct fd_gmem_stateobj
*gmem
= &ctx
->gmem
;
391 calculate_tiles(batch
);
392 DBG("%p: rendering %dx%d tiles %ux%u (%s/%s)",
393 batch
, pfb
->width
, pfb
->height
, gmem
->nbins_x
, gmem
->nbins_y
,
394 util_format_short_name(pipe_surface_format(pfb
->cbufs
[0])),
395 util_format_short_name(pipe_surface_format(pfb
->zsbuf
)));
396 fd_hw_query_prepare(batch
, gmem
->nbins_x
* gmem
->nbins_y
);
398 ctx
->stats
.batch_gmem
++;
401 fd_ringbuffer_flush(batch
->gmem
);
404 /* tile needs restore if it isn't completely contained within the
408 skip_restore(struct pipe_scissor_state
*scissor
, struct fd_tile
*tile
)
410 unsigned minx
= tile
->xoff
;
411 unsigned maxx
= tile
->xoff
+ tile
->bin_w
;
412 unsigned miny
= tile
->yoff
;
413 unsigned maxy
= tile
->yoff
+ tile
->bin_h
;
414 return (minx
>= scissor
->minx
) && (maxx
<= scissor
->maxx
) &&
415 (miny
>= scissor
->miny
) && (maxy
<= scissor
->maxy
);
418 /* When deciding whether a tile needs mem2gmem, we need to take into
419 * account the scissor rect(s) that were cleared. To simplify we only
420 * consider the last scissor rect for each buffer, since the common
421 * case would be a single clear.
424 fd_gmem_needs_restore(struct fd_batch
*batch
, struct fd_tile
*tile
,
427 if (!(batch
->restore
& buffers
))
430 /* if buffers partially cleared, then slow-path to figure out
431 * if this particular tile needs restoring:
433 if ((buffers
& FD_BUFFER_COLOR
) &&
434 (batch
->partial_cleared
& FD_BUFFER_COLOR
) &&
435 skip_restore(&batch
->cleared_scissor
.color
, tile
))
437 if ((buffers
& FD_BUFFER_DEPTH
) &&
438 (batch
->partial_cleared
& FD_BUFFER_DEPTH
) &&
439 skip_restore(&batch
->cleared_scissor
.depth
, tile
))
441 if ((buffers
& FD_BUFFER_STENCIL
) &&
442 (batch
->partial_cleared
& FD_BUFFER_STENCIL
) &&
443 skip_restore(&batch
->cleared_scissor
.stencil
, tile
))